Tubers oblong, 1–1 1/2 in. long. Plant 1 1/4–3 ft. high, with several ovate or lanceolate acute sheaths above, lower sheaths tubular. Stems reddish. Leaves two, on basal barren shoots, elliptic-oblong, subobtuse or apiculate, 3–6 in. long, 1/2–2 in. broad, sometimes with a single, shorter leaf below the middle of the stem. Raceme elongate, somewhat lax, 8–11 in. long. Flowers white, spurs and hood tinged with pink. Bracts ovate-lanceolate, acute, 6–10 lin. long. Pedicels 3 lin. long. Sepals 2 1/2–3 lin. long; odd one lanceolate-oblong, subacute; lateral falcately cuneate-oblong, longer and twice as broad. Petals united for half their length or more to the sepals, cuneate, obtuse, ciliate, and more membranous than the odd sepal. Lip galeate, subcompressed, carinate, 2 1/2–3 lin. long, basal half united to the lateral sepals; mouth rather narrow; margin and obtuse apex reflexed; spurs narrowly linear, recurved, 4–5 lin. long. Column 1 3/4–2 lin. long; stigma ovate-oblong, obtuse; rostellum trilobed, obtusely keeled behind, side lobes oblong, small, front lobe much larger, triangular-ovate, subobtuse, with reflexed sides.
